Adjustable light-fixture.



G. W. GRA'IGHEAD. ADJUSTABLE LIGHT FIXTURE. APPLICATION FILED NOV. 20, 1907.

901 ,955, Patented t. 27, 1908.

. 8140mm, QhfOraI head;

GEORGE W. ORAIGHEAD, OF RICHMOND, INDIANA.

ADJUSTABLE LIGHT-FIXTURE Specification of Letters Patent.

Application filed November 20, 1907.

Patented Oct. 27, 1908.

Serial No. 402,968.

To all whom it may concern:

Be it known that I, G'EORGE TV. CRAIGHEAD, a citizen of the United States, residing in Richmond, in the county of WVayne and State of Indiana, have invented certain new and useful Improvements in Adjustable Light- Fixtures, of which the following is a full, clear, and accurate specification.

My invention relates to an adjustable light-fixture having certain telescoping parts whereby the time and labor necessary for installing chandeliers or the like is reduced to a minimum.

The object of my invention, broadly stated, is the provision of an adjustable light-fixture which will be neat and attractive in appearance, strong and durable in construc tion, easily operated and controlled, and which can be manufactured and sold at a comparatively small additional expense therefor. The particular object of my present inven tion is to provide electric light chandeliers with a telescoping stem, by means of which, when being installed, the chandelier may be adjusted to the desired height from the floor of a room without the necessity of cutting or refitting any of the parts, this being especially advantageous to the electrician in charge of the work, and when adjusted in position my invention would not be noticeable to one unfamiliar with the invention.

Another object is to provide an adjustable light fixture which may be adjusted at various heights within reasonable limits, and having means whereby there will be no danger of the chandelier falling to the floor in case the securing means should inadvertently become loosened, by which means the chandelier can only drop to the limits of its extension.

Other minor objects and particular advantages of the invention will be suggested to an electrician by an inspection of the following specification, when taken in connec tion with the accompanying drawings forming a part thereof.

The preferred manner for the construction of my invention is shown most clearly in the accompanying drawings, in which Figure 1 shows a longitudinal central section of my invention as extended. Fig. 2 shows my invention in outside elevation, in extended operative position. longitudinal central section of the invention contracted, or partly so. Fig. 4 is a detail Fig. 3 is a.

longitudinal central section of a portion of the stem taken on an enlarged scale. Fig. 5 is a cross sectional view as taken through the stem. And Fig. 6 is a detail view showing the lower portions separated.

Similar reference characters denote like parts throughout the several views of the drawings.

I will now take up a detailed description of the invention and will set forth the construction and operation thereof as briefly and as compactly as I may.

Referring now to the drawings in detail: the letter A denotes the lower spider, hav ing one or a plurality of arms B and B threaded thereinto and extending out horizontally therefrom, which arms are adapted to carry electric light sockets on their outer ends.

The characters 0, C, and C denote the three parts of the case or body ornament which incloses the said spider and the inner portions of the parts connected to the spider. The shape of said case is immaterial and it may be variously designed. The parts C and C" should be integral with each other, while the lower edge of thepart G should neatly fit within the upper flange of the part C.

The letter D denotes a pintle extending up from the lower end of the member C and threaded into the center of the lower side of the spider A.

The letter E denotes a bushing which is threaded into the center of the upper side of the spider A. Threaded into the bushing E, and extending upwardly at right angles to said arms, is a comparatively long pipe F, which for convenience is termed the small pipe. Secured around the periphery of the upper end of the pipe F is a collar G, for the purposes presently appearing. The letter H denotes the comparatively large pipe which is of substantially the same length as said smaller pipe. The inner diameter of the pipe H is somewhat greater than is the outside diameter of the pipe F, while the collar Gr secured to small pipe is of a diameter to fit the interior of the large pipe, being adapted to slide therein. Secured on the lower end of the pipe H isa bushing J which has an inside diameter slightly greater than the outside diameter of the small pipe F, to allow said pipe F to slide therethrough. Disposed through the wall of the pipe H, near its center longitudinally, is a threaded aperture to receive the screw I. By the above it is apparent that the pipes F and H may be tclcscoped. or they may be drawn out some distance, and secured together by insorting the screw I. it is manifest that as the screw is run in that it will impinge on some part of the pipe i and press it over resiliently against the wall of the pipe H, thereby causing th collar G to grip the inner wall of the pipe ll. and the pipe F to grip the bushing J, thereby locking the two pipes at that point. and also prc enting them from rattling. Secur l on t upper end of the pipe ll is a spider I; having arms with screw apertures therethrough by which the chandelier ma be secured to and suspended from a ceiling. The letters l1 and iii designate the tn which :--:urround said telescoping pi 1c smaller casing ii is of same length as the pipe H. around which it is adapted to slide. neatly fitting thercovcr as The letter M denotes the larger casing, which should be about one-halt the length of the smaller casing, over which it neatly fits and is adapted to slide thereon. The lower end of the casing M extends down into and is secured in the neck formed between the members C and C of the case, whereby the members C and C will be moved up or down as the casing iii is slid endwise on the casing L. Sccnrec. around the upper end of the casing M is a collar N having a set-screw l threaded theretln'ougi'h at right angles to the casing. by which when the casings IA and M are adjusted as desired the set-screw l" may be run in to impinge on the casing L, thereby locking the two casings together.

The letter ll denotes a hood, diverging lip-- wards, slidable on the casing L and securable thereto by the set-screw S. Said hood adapted to inclose the spider K, covering the connection of the chandelier with the ceiling, and contributing to the ornamentation. The screw I should be of a length such as to eX- tend through and outside the casing L being project-ed through an aperture therciior in said casing, as indicated in the drawings.

The length of the wires may be such as to allow the invention to be extended to its limit, and then when the parts are telescopcd the wires may double up within the pipes and the spiders. However I would have it understood that the wires may be out just the right length for the adjustment to be made in each particular instance, as it is not intended that the adjustment should be changed after the initial installation, except in the case of repairs or the like.

By the above it is apparent that the height of the chandelier from the floor may be adjusted without cutting or adding to any of the members, thereby dispensing with a great amount of fitting.

In order to change the adjustment of the invention, as to height, I have only to loosen the screws 1 and P, thereby allowing the pipe F to slide in the pipe H, and allowing the casing M to slide over the casing L, until the right adjustment isobtained, after which the said screws are to be tightened which will secure the parts of the invention in their adjusted position.

I desire that it be understood that various changes may be made in the details of con struction without departing from the spirit of my invention or sacrificing any of the advantages thereof.

Having now fully shown and described my invention and the best means for its construction to me known at this time, what I claim and desire to secure by Letters Patent of the United States, is I.

An adjustable light-fixture, comprising, in combination, the following parts: a stem carrying, at its lower end, a spider and, at its upper end, a collar; a tube within which said stem is adapted to slide; a bushing disposed within said tube and encircling said atom; a socket member inclosing said tube; a set screw passing through said socketincmber and said tube and bearing against said stein; a cylindrical member carried by and inelosing the lower portion of said socket member; and a set screw passing through said cylindrical member and said socket-member toward the top thereof.

in testimony whereof I have hereunto subscribed my name to this specification in the presence of two subscribing witnesses.

GEORGE W. CRAIGHEAD. li itnesses R. E. RANDLE, R. V. RANDLE. 

